Force-feed carbureter.



C. W. FARQUHARSON.

PRGB FEED CARBURETER.

APPLIQATION rILBD 00T.13,191o. RENEWED Nov.8,1911,

G. W. FARQUHARSON.

FORGE FEED GARBURETER.

APPLICATION FILED 0UT.13,1910 RENEWED Nov. s, 1911.

Patented Dec. 19, 1911.

2 SHEETSSHBET 2 @witnesses M 9i/bj CHARLES W. FAMUHABSOH, 01? CHICAGO,ILLINOIS.

TOME-FEED GABBUBETEB.

Indication of Let-tern Patent.

Patented Dec. 19, 1911.

Application illed october 18, 1910, Serial llo. 586,924. RenewedNovember B, 1911. Serial Io. 669,247.

To all whom it ma/y ummm:

Be it knownthat I CHAnms W. Fn- QUHAnsoN, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in Force-Feed Carbureters; and I do declare the following to be a full, clear,and exact descri tion of the invention, such as will enab e othersskilled in the art to which it appertains to make and use the same.

This invention relates to improvements in force feed carbureters.

One object of the Ainvention is to provide a force feed carburetorhaving an improved construction of pump, the parts of which operatewithout friction and are consequently not subjected to material wear.

Another object is to rovide a carburetor of this characterwhic will becomparativel simple in construction, eilicient and relia le in operationand which may be connected with and operated by any explosive engine.

With the foregoing and other objects in view, the invention consists ofcertain novel 'features of construction, combination and arrangement ofparts as will be more fully descri ed and particularly pointed out inthe ap ended claims.,

In t e accompanying drawings: Figure 1 is a vertical lon 'tudinalsection of a carbureter constructs in accordance with the invention;Fig. 2 is a side view of a portion of the same; Fig. 3 is a verticalcross section on the line 3--3 of Fig. 1; Fig. 4 is a similar view onthe line 4-4 of Fig.- 1.

Referring more particularly to the drawings, 1 denotes the charge tubeof the engine, said tube having a flared upwardly projectin end 2 inwhich is arranged concaved de ecting plates 3 and 4. The plates 3 and 4are spaced a suitable distance apart and in the upper portion of theplate 3 is formed a series of perforations 5, while in the center orbottom of the plate 4 is formed an opening 6. The u per edga of theflared u p er end of the c arge tu provided wit an inwardly projectingannular flange 7 to which is secured the anged upper edges of the lates3 and 4, said parte bein secured y screws or similar astenin evices.

The ared upper end 2 of the charge tube and the plates 3 and 4 form thelower portion of a carburetor. The upper portion 'charge tube 1 is apump ormixing chambsertf tlhe carburetor com prises a casi e ower o endo which is rolil'igded with an outgvnrdly and downwar y projectingradial flange 9 which fits over and is secured to the flanged edge ofthe upper portion 2 of the charge tube 1 by the same fastening screwswhich secure the dates 3 and 4 thereto. The upr end o the casing 8 iscontracted and as formed therein an air inlet opening or mouth 9 whichis provided with a cover 10 wherebnthe same may be closed when desired.o the casing 8 is arranged a transyersely dis osed oil conducting ipe 11having form thereon an upwa y projectmg branch discharge pi 12 in theupper end of which is arran edea valve casi 13 provided with a checvalve 14 whic is adapted to open under rassure to permit the fuel to bedischarge from the ipe 12 and into the connecting chamber of t ecarbureter.

The oil or fuel when discharged through the valve falls onto a cone shaed deilectin plate 15 which .is secured to t e upper en of the branchlpipe 12 and has its outer edge curved upwa l to provide a gutter 16 inwhich is form a series of oil discharging passages 17. The outer edge ofthe plate 15` is in close engagement with the inner wall of the casing 8so that said plate practically forms a partition in said casing.Connected with `the outer end of the oil conductmg pipe 11 is a valvecasing 18 in which is arranged a check valve '19. With the valve casing18 is connected the adjacent end of a fuel conducting tube 20 whichleads to and is connected with the fuel supply tank (not shown).

Connected to the casing 8 and to the supporting frame 21 in which isarrange my. improved fuel pum `22. The pump 22 is formed in two mem rs23 and 24 each of which consists of a series of hollow annular sections,said sections being formed from pairs of thin metal disks 25 providedwith centrally disposed circular fpassages. The outer ed es of each pairo disks 25 are connected y annular rings or bands '26, while the disksof adjapenl sections arie1 conneted at lthe edges o t e openings erein ycoup ing rings 27. The outer disk of the outer section of thev member 23of the pump is connested around the edge of the opening therein to atubular exteriorly threaded couiid pling 2B which has a screw threadedengage- 'ment with a bushing 29 arranged in the adjacent end of the pumsupporting frame 21. The cou ling mem r 28 is connected in any suitablemanner to a pipe 30 whlch connects with the exhaust port of the engine.The outer disk of the inner sectlon of the pump member 23 is secured toa sectional connecting rod 31 hereinafter more full described.

e member 24 of the pump is constructed in the same manner as the member23 and the outer disk of the outer section of-said member is connectedto the fuel conducting pipe 11 by a tubular couplin 32. The outer diskof the inner section o the member 24 is connected to the o posite end ofthe sectional connecting ro 31, said rod thus operatively connecting thetwo members 23 and 24 of the pump together:

The connecting rod 31 is formed 1n two sections the inner end of one ofwhich is provided with a reduced threaded extension 33, while the innerend of the opposlte section is formed with a threaded socket 34 in whichis screwed the reduced threaded end 33 of the first mentioned sectionthus detachably connectin rod together. On t e rod, adjacent the umpmember 25, is formed an annular stop an 35 the urpose of which will behereina ter descri d. The connectlng rod 31 is loosely engaged with andis adapted to slide through an exteriorly threaded bushing 36 which isadjustably mounted in a threaded aperture in the lower end of asupporting arm or bracket 37 formed on the pump supporting frame 21 asshown.

Formed on the end of the bushing 36 remote from the flange 35 on theconnecting rod 31, is an annular flan 38and between the flange 38 andthe brac et 37 is clam ed a bushing adusting collar 39, said colarhaving'forme on one side a laterall projecting lever 40 which isconnected y an operating rod 41 to the laterally projecting stem 42 of acharge regulating va ve 43 a r ranged in the char supply pipe 1, saldstern 42 being provi ed w1 44 Yto which the lower end of the operatingrod 42 is connected in an suitable manner.

As hereinbefore state the pump 22 is connected to the exhaust of theengine so that when the latter exhausts it exerts a pressure in the engior member 23 of the pump. As the di s 25 are of very thm material, theyspread apart under the pressure at their inner ends and this actionpushes the connecting rod 31 through the coupling and thereby closes theother member 24 of the ump by forci the inner edges of the dislgsthereof towar each other. The connecting rod 31 serves as a piston andthe members 23-24 constitute flexible connectins between the same andthe fixed said sections of the.

a crank handleA tubular supports 28 and 32 respectively. The exhaustfrom the en ine exerts a pressure against the end of t e rod 31appearing at the left in Fig. 1 and the rod or piston is thereby ushedto the right through the sleeve 36. e inner edges of the member 24 yieldto this movement of the piston 31 and an increased back pressure is.applied through the lipe 11 upon the inwardly opening check va ve 19 soas to close said valve and open outwardly opening check valve 14,thereby forcing a charge of fuel out of the pipe 12 to the casing 15,whence it passes throutgrl the perforations 16 mixi with the air a ittedthrough th'e air intlallre 9 and being dashed against the deiectinglates 4 and 3 the charge passes through t e dischargp perforations 5 inthe latter, by means of w ich it is split or broken up into fine'particles, thus causing a thorou h mixing of the gasolene and the airwhic enters the charge tube 1 and is conducted thereby to the engine.Between the exhausts of the `engine the ressure is relieved in themember 23 of t e pump, thus permitting it to retract or assume itsnormal position and the rod 31 to move from the ipe 11. The partialvacuum thus creates will relieve the pressure on the inner sides of thevalves 14- and 19 so that the valve 14 will close and the valve 19 willopen, permitting a fresh char e of fuel to be drawn into the pipe 11whic will he forced into the carbureter casing in the manner described.

In starting the device the cover 10 isclosed tightly on the carburetercasing and the engine 1s then cranked in the usual manner which causes avacuum in the carbureter chamber. The vacuum thus formed will draw in asuliicient quantity of gasolene to Vcause an explosion in the enginewhich will start the latter afimr which the pump will be automaticallyoperated by the successive exhausts of the engine in the manner de-vscribed. It will be understood that the cover 10 of the carburetor iskept continuously open except when the engine is started whereupon thecover is tightl closed to permit the vacuum to be formed by the pump inthe carburetor chamber.

The length of the stroke of the pump is determine by the ad ustment ofthe sleeve 36 to and from the ange 35, so that the sleeve at the end ofits stroke will strike said dange sooner or later. 'his adjustment ofthe sleeves is governed automatically by the opening or closing movementof the valve 43 which is governed by the operator in any usual manner.When the stem 42 of the` valve is turned to adjust the valve to a moreor less open position to admit more or less fuel, the crank arm 44 willmove the rod 41 longitudinally which will thus move the crank arm 40 andthrough it and the collar 39`t will rotate the sleeve 36 in the properdirection to shorten or lengthen the stroke of the pump, as may benecessary according to the speed of the engine.

Various changes in the form, proportion and the minor details ofconstruction may be resorted to without departing from the principle orsacrificing any of the advantages of the invention as defined in theappended claims.

Having thus described my invention, what I claim is:

1. A force feed carbureter comprising a' charge supply tube a carburetercasing arranged thereon and connected thereto, an oil conducting pipeextending through Said casing and having inlet and discharge valves, a.reciprocating member alined with said oil pipe, a pipe for admittingfluid pressure to said member, a hollow flexible connection between saidpipe and said member, a hollow flexible connection between said memberand the oil conducting pipe, a fixed support for said member between theflexible connections, a flange on said member, and a sleeve adjustablymounted in said support in the ath ofthe flange.

Q. A force flied carbureter comprising a charge supply tube, acarbureter casing arranged thereon, an oil conducting pipe extendingthrough said carbureter casing and discharging thereinto, inlet' anddelivery valves in said pipe, a cover to close the casing, areciprocatory member, a hollow flexible connection between one end ofsaid member and said oil conducting pipe, a fluid pressure pipe, ahollow flexible connection between said pipe and the opposite end ofsaid member, an adjustably mounted bushing surrounding the reciprocatorymember,

a stop flange on said member adapted to engage the end of the bushingwhereby to limit the stroke of the member, a collar se cured around saidbushing, a throttle valve in said charge supply tube, and connectionsbetween the stem of said valve and the said collar whereby the bushingand the valve may be simultaneously adjusted.

3. A force feed carbureter comprising a charge supply tube, a carburetercasing arranged thereon, an oil conducting pipe extending through saidcarbureter casing and discharging thereinto and provided with inlet andoutlet valves, a reciprocatory member, a hollow flexible connectionbetween one end of said member and the oil conducting pipe, an engineexhaust pipe, a hollow fle-xible connection between said pipe and theopposite end of the reciprocatory member, a bushing surrounding thereciprocatory member and having a threaded mounting whereby it will movelongitudinally when rotated, a stop flange on said member adapted toengage the end of the bushing whereby to limit the stroke of the member,a collar secured around said bushing, a throttle valve arranged in thecharge supply tube and having its stem projecting laterally through thestem, a crank arm on said collar, a crank arm on said valved stem, and aconnecting rod secured to and extending between said crank arms.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

CHARLES W. FARQUHARSON.

Witnesses DANIEL J. QUINLON, ANNA M. OLsEN.

